<template>
    <!-- 商品分类导航 -->
    <div class="type-nav">
        <div class="container">
            <div class="nav-left" @mouseenter="isShowNav = true" @mouseleave="handlerIsShowNav">
                <h2 class="all">全部商品分类</h2>
                <Transition enter-active-class="animate__fadeIn" leave-active-class="animate__fadeOut">
                <div  class="sort animate__animated" v-show="isShowNav">
                    <div @click="toSearch" class="all-sort-list2">
                        <!-- 一级分类 -->
                        <div class="item" v-for="c1 in categoryList" :key="c1.categoryId">
                            <h3>
                                <a data-level="1" :data-id="c1.categoryId">{{ c1.categoryName }}</a>
                            </h3>
                            <div class="item-list clearfix">
                                <!-- 二级分类 -->
                                <div class="subitem" v-for="c2 in c1.categoryChild" :key="c2.categoryId">
                                    <dl class="fore">
                                        <dt>
                                            <a data-level="2" :data-id="c2.categoryId">{{ c2.categoryName }}</a>
                                        </dt>
                                        <dd>
                                            <!-- 三级分类 -->
                                            <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                                                <a data-level="3" :data-id="c3.categoryId">{{ c3.categoryName }}</a>
                                            </em>
                                            <!-- 三级分类 -->
                                        </dd>
                                    </dl>
                                </div>
                                <!-- 二级分类 -->
                            </div>
                        </div>
                        <!-- 一级分类 -->
                    </div>
                </div>
                </Transition>
            </div>

            <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
        </div>
    </div>
</template>

<script>
import 'animate.css';
import { mapState, mapActions } from 'vuex';

export default {
    name: "TypeNav",
    data() {
        return {
            isShowNav: this.$route.path === "/"
        }
    },
    computed: {
        ...mapState("home", ["categoryList"])
    },
    methods: {
        ...mapActions("home", ["GetCategoryList"]),
        // 跳转 search 方法
        toSearch(e) {
            // 获取 dataset 数据
            // console.log(e.target.dataset)
            // 获取 id 和 分类级别
            let { id, level } = e.target.dataset
            // 获取 分类名
            let categoryName = e.target.innerText;

            // 获取 地址栏 query 参数 [keyword]
            let {keyword}=this.$route.query;

            // 判断是否存在 level/id 解决空白跳转的bug
            if (level) {
                this.$router.push({
                    path: "/search",
                    query: {
                        [`category${level}Id`]: id,
                        categoryName,
                        keyword
                    }
                });

                // 隐藏
                this.isShowNav=false;
            }

            
        },
        // 鼠标移除切换 typenav
        handlerIsShowNav() {
            this.$route.path !== "/" ? this.isShowNav = false : null
        }
    },
    mounted() {
        // 调用 store 中的方法 发送请求 获取三级分类数据
        this.GetCategoryList()
        // console.log(this.$store)
    }
}
</script>

<style lang="less" scoped>
.type-nav {
    border-bottom: 2px solid #e1251b;

    .container {
        width: 1200px;
        margin: 0 auto;
        display: flex;
        position: relative;

        .all {
            width: 210px;
            height: 45px;
            background-color: #e1251b;
            line-height: 45px;
            text-align: center;
            color: #fff;
            font-size: 14px;
            font-weight: bold;
        }

        .nav {
            a {
                height: 45px;
                margin: 0 22px;
                line-height: 45px;
                font-size: 16px;
                color: #333;
            }
        }

        .sort {
            position: absolute;
            left: 0;
            top: 45px;
            width: 210px;
            height: 461px;
            position: absolute;
            background: #fafafa;
            z-index: 999;
            animation-duration: .5s;

            .all-sort-list2 {
                .item {
                    h3 {
                        line-height: 30px;
                        font-size: 14px;
                        font-weight: 400;
                        overflow: hidden;
                        padding: 0 20px;
                        margin: 0;

                        &:hover {
                            background: #e1251b;

                            a {
                                color: white;
                            }
                        }

                        a {
                            color: #333;
                        }
                    }

                    .item-list {
                        display: none;
                        position: absolute;
                        width: 734px;
                        min-height: 460px;
                        background: #f7f7f7;
                        left: 210px;
                        border: 1px solid #ddd;
                        top: 0;
                        z-index: 9999 !important;

                        .subitem {
                            float: left;
                            width: 650px;
                            padding: 0 4px 0 8px;

                            dl {
                                border-top: 1px solid #eee;
                                padding: 6px 0;
                                overflow: hidden;
                                zoom: 1;

                                &.fore {
                                    border-top: 0;
                                }

                                dt {
                                    float: left;
                                    width: 54px;
                                    line-height: 22px;
                                    text-align: right;
                                    padding: 3px 6px 0 0;
                                    font-weight: 700;

                                    a:hover {
                                        color: #e1251b;
                                    }
                                }

                                dd {
                                    float: left;
                                    width: 555px;
                                    padding: 3px 0 0;
                                    overflow: hidden;

                                    em {
                                        float: left;
                                        height: 14px;
                                        line-height: 14px;
                                        padding: 0 8px;
                                        margin-top: 5px;
                                        border-left: 1px solid #ccc;

                                        a:hover {
                                            color: #e1251b;
                                        }
                                    }
                                }
                            }
                        }
                    }

                    &:hover {
                        .item-list {
                            display: block;
                        }
                    }
                }
            }
        }
    }
}
</style>